Requirement 11.4.3 mandates regular external penetration testing to assess system security from untrusted network connections, ensuring organizational independence between testers and systems.

*Highlights*
Regular external penetration testing is required to evaluate system security from untrusted locations. 🔒
Penetration tests must be conducted at least annually and after significant changes to applications or infrastructure. 🔍
Qualified internal or external resources can perform the testing. 🛡️
Organizational independence between testers and systems being tested is crucial. 🕵️‍♂️

*Key Insights*
🔒 Regular external penetration testing is essential to identify vulnerabilities that may be exploited by attackers attempting to access systems from untrusted networks.
🔍 The frequency of penetration testing ensures that security measures remain effective and up-to-date in the face of evolving threats and changes to the environment.
🛡️ Utilizing qualified resources for penetration testing ensures that testing is conducted effectively and accurately, providing reliable results for improving system security.
🕵️‍♂️ Maintaining organizational independence between testers and systems being tested helps to ensure unbiased assessments and thorough evaluations of security measures in place.